fix: mappings/VegCore-VegBIEN.csv: taxonoccurrence.sourceaccessioncode: need to populate from aggregateOrganismObservationID when only that is available

moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).

inputs/CVS/: added taxon_observation.** left-join of the tables, using the steps at http://wiki.vegpath.org/Left-joining_a_datasource. this involves renaming taxonOccurrenceID->taxonOccurrenceID__overall_plot so that it can then be joined together with aggregateOrganismObservationID to create the full taxonOccurrenceID (as in VegBank).

inputs/CVS/: switched to new-style import, using the steps at http://wiki.vegpath.org/Adding_new-style_import_to_a_datasource

inputs/CVS/stemCount_/: translated filters to postprocessing derived columns, using the steps at http://wiki.vegpath.org/Adding_new-style_import_to_a_datasource#1-Translate-filters-to-postprocessing-derived-columns. note that the inserted row count changes, because there is now a primary key (which the table is auto-sorted by) where previously there was none.

bugfix: inputs/CVS/stemCount_/map.csv: ensure the aggregateoccurrence.sourceaccessioncode is always populated, because this is a required field when using sourceaccessioncodes. without it, the import will exclude rows which lack a value in this field because it cannot deduplicate on it for these rows, leading to the dropping of large numbers of occurrences. this shows up when comparing provider_count to the input table's row count, and produces the following error in the .errors table:...

fix: bin/map: put template: comment out the "Put template:" label so that the output is valid XML, and displays properly in a browser rather than showing a syntax error

bugfix: mappings/VegCore-VegBIEN.csv: nest all taxonoccurrences inside a stratum event, so that the parent locationevent is always fully populated before child locationevents point to it. (previously, a stub parent event was created when the child event was imported first, which blocked the fully-populated parent event from being inserted later on.) this uses auto-folding (for VegBank/CVS) and auto-forwarding (for other datasources) to prune empty stratum events for taxonoccurrences that don't have strata. (see wiki.vegpath.org/Auto-folding, wiki.vegpath.org/Auto-forwarding for more info about these normalization techniques.) note that the inserted row counts stay exactly the same for all datasources except VegBank (which was being fixed), indicating that this signficant change to the mappings did not change the semantics of the import of taxonoccurrences.

inputs/*/*/test.xml.ref: updated source.shortname for new datasource name, which now starts out with .new suffix

inputs/CVS/: Joined together taxonImportance and stemCount tables to create stemCount_, because stemCount actually stores stem abundance by size, rather than grouping stems by organism (http://vegbankdev.nceas.ucsb.edu/vegbank/views/dba_tabledescription_detail.jsp?view=detail&wparam=stemcount&entity=dba_tabledescription&where=where_tablename), and is thus an AggregateOccurrence-related table along with taxonImportance

inputs/CVS/: Refreshed data with new export from Bob